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参考解析：
刷刷题刷刷变学霸
举一反三
【单选题】位于美国亚利桑那州西北部的科罗拉多大峡谷，全长446千米，平均宽度16千米，最深处2133米。峡谷两侧都是红色的含有代表性的生物化石的巨岩断层，这里的土壤大都是褐色，但当它沐浴在阳光中时，由于不同岩层中的矿物不同，色彩时而深蓝，时而又是赤色，变幻无穷，令人流连忘返。【图片】下列关于峡谷地貌的形成过程，正确的是
A.
固结成岩—风化剥蚀—侵蚀搬运
B.
高压变质—地壳抬升—风化剥蚀
C.
岩浆侵入—地壳抬升—侵蚀搬运
D.
外力沉积—地壳抬升—流水侵蚀
【多选题】实现罗拉牵伸的条件有
A.
有两个能握持纱条的钳口
B.
两钳口间要有一定距离，且要与纱条内的纤维长度相适应
C.
两钳口要有相对运动，输出端线速度大于输入端线速度
D.
一定要有附加牵伸机构
【单选题】The Grand Canyon Standing on the rim of the Grand Canyon(大峡谷), gazing across this giant wound in the Earth’’s suce, a visitor might assume that the canyon had been caused by some ancient convulsion...
A.
its shapes are constantly changing
B.
it contains approximately 14 million tons of rock
C.
its eruptions have increased in recent years
D.
it is being eroded by toxic waste and pollutants
【单选题】Standing on the rim of the Grand Canyon(大峡谷), gazing across this giant would in the Earth's suce, a visitor might assume that the canyon had been caused by some ancient convulsing (震动)．In fact, the...
A.
patterns of erosion in different mountain ranges
B.
forces that made the Grand Canyon
C.
the increasing pollution of the Colorado River
D.
the sudden appearance of the Grand Canyon
【单选题】分离罗拉顺转定时提早则（）
A.
钳板闭合定时应提早，弓形板定位应推迟
B.
钳板闭合定时及弓形板定位均应相应提早
C.
钳板闭合定时及弓形板定位均应相应推迟
D.
钳板闭合定时应推迟，弓形板定位应提早
【单选题】1万年前，科罗拉多大峡谷中的松鼠（原种群中黑毛基因A的基因频率为50%）被一条河流分隔成两个种群，两个种群现在已经发生明显的分化。研究人员指出，经过长期演化两个种群可能形成两个物种，下列说法错误的是（ ）【图片】
A.
①②③④⑤⑥为生物进化提供原材料
B.
b 表示自然选择过程 ,是不定向的
C.
若环境变化后，种群中基因型为 AA 、 Aa 的个体数量在一年后各增加 20% ，基因型为 aa 的个体数量减少 20% ，则一年后 a 的基因频率为5/11
D.
没有D
【单选题】The Grand Canyon Standing on the rim of the Grand Canyon(大峡谷), gazing across this giant wound in the Earth’’s suce, a visitor might assume that the canyon had been caused by some ancient convulsion...
A.
its shapes are constantly changing
B.
it contains approximately 14 million tons of rock
C.
its eruptions have increased in recent years
D.
it is being eroded by toxic waste and pollutants
【单选题】The Grand Canyon Standing on the rim of the Grand Canyon(大峡谷), gazing across this giant wound in the Earth’’s suce, a visitor might assume that the canyon had been caused by some ancient convulsion...
A.
Astronomy
B.
Botany(植物学)
C.
Geology
D.
Chemistry
【单选题】The Grand Canyon Standing on the rim of the Grand Canyon(大峡谷), gazing across this giant wound in the Earth’’s suce, a visitor might assume that the canyon had been caused by some ancient convulsion...
A.
it was caused by some ancient convulsion
B.
its presence is an embarrassment to the state of Colorado
C.
it looks like an injury on the Earth’s suce
D.
it has caused many visitors to injure themselves
相关题目：
【单选题】位于美国亚利桑那州西北部的科罗拉多大峡谷，全长446千米，平均宽度16千米，最深处2133米。峡谷两侧都是红色的含有代表性的生物化石的巨岩断层，这里的土壤大都是褐色，但当它沐浴在阳光中时，由于不同岩层中的矿物不同，色彩时而深蓝，时而又是赤色，变幻无穷，令人流连忘返。【图片】下列关于峡谷地貌的形成过程，正确的是
A.
固结成岩—风化剥蚀—侵蚀搬运
B.
高压变质—地壳抬升—风化剥蚀
C.
岩浆侵入—地壳抬升—侵蚀搬运
D.
外力沉积—地壳抬升—流水侵蚀
【多选题】实现罗拉牵伸的条件有
A.
有两个能握持纱条的钳口
B.
两钳口间要有一定距离，且要与纱条内的纤维长度相适应
C.
两钳口要有相对运动，输出端线速度大于输入端线速度
D.
一定要有附加牵伸机构
【单选题】The Grand Canyon Standing on the rim of the Grand Canyon(大峡谷), gazing across this giant wound in the Earth’’s suce, a visitor might assume that the canyon had been caused by some ancient convulsion...
A.
its shapes are constantly changing
B.
it contains approximately 14 million tons of rock
C.
its eruptions have increased in recent years
D.
it is being eroded by toxic waste and pollutants
【单选题】Standing on the rim of the Grand Canyon(大峡谷), gazing across this giant would in the Earth's suce, a visitor might assume that the canyon had been caused by some ancient convulsing (震动)．In fact, the...
A.
patterns of erosion in different mountain ranges
B.
forces that made the Grand Canyon
C.
the increasing pollution of the Colorado River
D.
the sudden appearance of the Grand Canyon
【单选题】分离罗拉顺转定时提早则（）
A.
钳板闭合定时应提早，弓形板定位应推迟
B.
钳板闭合定时及弓形板定位均应相应提早
C.
钳板闭合定时及弓形板定位均应相应推迟
D.
钳板闭合定时应推迟，弓形板定位应提早
【单选题】1万年前，科罗拉多大峡谷中的松鼠（原种群中黑毛基因A的基因频率为50%）被一条河流分隔成两个种群，两个种群现在已经发生明显的分化。研究人员指出，经过长期演化两个种群可能形成两个物种，下列说法错误的是（ ）【图片】
A.
①②③④⑤⑥为生物进化提供原材料
B.
b 表示自然选择过程 ,是不定向的
C.
若环境变化后，种群中基因型为 AA 、 Aa 的个体数量在一年后各增加 20% ，基因型为 aa 的个体数量减少 20% ，则一年后 a 的基因频率为5/11
D.
没有D
【多选题】黄河大峡谷景区的景观有
A.
红海子
B.
包子塔
C.
崔家寨
D.
太极湾
E.
沙圪堵
【单选题】纤维在罗拉牵伸区变速的条件为?
A.
引导力 > 牵伸力
B.
引导力 = 牵伸力
C.
引导力 > 控制力
D.
引导力 > 握持力
【单选题】The Grand Canyon Standing on the rim of the Grand Canyon(大峡谷), gazing across this giant wound in the Earth’’s suce, a visitor might assume that the canyon had been caused by some ancient convulsion...
A.
its shapes are constantly changing
B.
it contains approximately 14 million tons of rock
C.
its eruptions have increased in recent years
D.
it is being eroded by toxic waste and pollutants
【单选题】The Grand Canyon Standing on the rim of the Grand Canyon(大峡谷), gazing across this giant wound in the Earth’’s suce, a visitor might assume that the canyon had been caused by some ancient convulsion...
A.
Astronomy
B.
Botany(植物学)
C.
Geology
D.
Chemistry
【单选题】卡罗拉双擎E+相比荣威ei6的优势是（）。
A.
轴距长
B.
尺寸大
C.
上市早
D.
使用成本低
【单选题】The Grand Canyon Standing on the rim of the Grand Canyon(大峡谷), gazing across this giant wound in the Earth’’s suce, a visitor might assume that the canyon had been caused by some ancient convulsion...
A.
it was caused by some ancient convulsion
B.
its presence is an embarrassment to the state of Colorado
C.
it looks like an injury on the Earth’s suce
D.
it has caused many visitors to injure themselves