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参考解析：
刷刷题刷刷变学霸
举一反三
【单选题】Text If you are worried about things and are under a lot of stress at work or school, then you are probably not sleeping well. Worry can keep you awake, tossing and (26) in bed until the early hours o...
A.
pause
B.
break
C.
vacation
D.
interruption
【单选题】对咖啡因的叙述不正确的是
A.
作用部位在大脑皮层
B.
较大剂量可直接兴奋延脑呼吸中枢
C.
中毒剂量时可兴奋脊髓
D.
收缩支气管平滑肌
E.
直接兴奋心脏，扩张血管
【多选题】咖啡因的药理作用有（）
A.
小剂量振奋精神
B.
较大量可间接兴奋延脑呼吸和血管运动中枢
C.
中毒量兴奋脊髓产生惊厥
D.
舒张支气管平滑肌和利尿作用
E.
刺激胃酸分泌
【单选题】If you are worried about things and are under a lot of stress at work or school, then you are probably not sleeping well. Worry can keep you awake, tossing and【C1】______in bed until the early hours of...
A.
turning
B.
rolling
C.
twisting
D.
rotating
【单选题】Text If you are worried about things and are under a lot of stress at work or school, then you are probably not sleeping well. Worry can keep you awake, tossing and (26) in bed until the early hours o...
A.
nevertheless
B.
since
C.
though
D.
however
【单选题】"Sleep is a behavior and, like all behaviors, it differs greatly among people," explains Dr. Carol Landis. "The greatest differences occur in the timing of sleep and the amount of sleep—the factors wh...
A.
how to change one’s sleep pattern
B.
what to do before going to bed
C.
what to do with sleeplessness
D.
how to get a good night’s sleep
【单选题】Text If you are worried about things and are under a lot of stress at work or school, then you are probably not sleeping well. Worry can keep you awake, tossing and (26) in bed until the early hours o...
A.
relieved
B.
renewed
C.
refreshed
D.
released
【单选题】咖啡因的反应（）
A.
与吡啶硫酸铜溶液作用生成紫堇色
B.
与盐酸、氯酸钾在水浴上加热蒸干，再遇氨生成紫色，加氢氧化钠数滴，紫色消失
C.
加氢氧化钾醇溶液和一粒固体请氧化钾，初显深紫堇色，继变暗红色，最后颜色消失
D.
加三氯化铁试剂呈蓝色
E.
在碱性溶液中水解有甲醛生成
【单选题】If you are worried about things and are under a lot of stress at work or school, then you are probably not sleeping well. Worry can keep you awake, tossing and (26) in bed until the early hours of the...
A.
spiritually
B.
consciously
C.
mentally
D.
emotionally
【单选题】有关咖啡因的说法错误的是
A.
大剂量直接兴奋延脑呼吸中枢和运动中枢
B.
小剂量兴奋大脑皮层
C.
中毒剂量兴奋脊髓
D.
可直接兴奋心脏、扩张血管
E.
收缩支气管平滑肌、利尿及刺激胃酸分泌
相关题目：
【多选题】咖啡因的主要性质有
A.
弱碱性化合物
B.
无色针状晶体
C.
味苦
D.
加热升华
E.
中枢神经兴奋药
【单选题】咖啡因过量引起的不良反应不包括（）
A.
躁动不安
B.
呼吸抑制
C.
失眠
D.
呼吸加快，心动过速
E.
肌肉抽搐
【单选题】对咖啡因的叙述不正确的是
A.
作用部位在大脑皮层
B.
较大剂量可直接兴奋延脑呼吸中枢
C.
中毒剂量时可兴奋脊髓
D.
收缩支气管平滑肌
E.
直接兴奋心脏，扩张血管
【判断题】咖啡因是一种弱碱。
A.
正确
B.
错误
【多选题】咖啡因的药理作用有（）
A.
小剂量振奋精神
B.
较大量可间接兴奋延脑呼吸和血管运动中枢
C.
中毒量兴奋脊髓产生惊厥
D.
舒张支气管平滑肌和利尿作用
E.
刺激胃酸分泌
【单选题】咖啡因兴奋中枢的主要部位是（ ）。
A.
延髓
B.
脊髓
C.
大脑皮层
D.
丘脑
E.
A和C
【单选题】"Sleep is a behavior and, like all behaviors, it differs greatly among people," explains Dr. Carol Landis. "The greatest differences occur in the timing of sleep and the amount of sleep—the factors wh...
A.
how to change one’s sleep pattern
B.
what to do before going to bed
C.
what to do with sleeplessness
D.
how to get a good night’s sleep
【单选题】咖啡因的反应（）
A.
与吡啶硫酸铜溶液作用生成紫堇色
B.
与盐酸、氯酸钾在水浴上加热蒸干，再遇氨生成紫色，加氢氧化钠数滴，紫色消失
C.
加氢氧化钾醇溶液和一粒固体请氧化钾，初显深紫堇色，继变暗红色，最后颜色消失
D.
加三氯化铁试剂呈蓝色
E.
在碱性溶液中水解有甲醛生成
【单选题】咖啡因的药理作用不包括（）
A.
强心作用
B.
中枢兴奋作用
C.
中枢镇静作用
D.
松弛平滑肌作用
E.
增强心肌收缩力
【单选题】If you are worried about things and are under a lot of stress at work or school, then you are probably not sleeping well. Worry can keep you awake, tossing and (26) in bed until the early hours of the...
A.
spiritually
B.
consciously
C.
mentally
D.
emotionally
【单选题】咖啡因过量引起的不良反应不包括（）
A.
躁动不安
B.
呼吸抑制
C.
失眠
D.
呼吸加快，心动过速
E.
肌肉抽搐
【单选题】有关咖啡因的说法错误的是
A.
大剂量直接兴奋延脑呼吸中枢和运动中枢
B.
小剂量兴奋大脑皮层
C.
中毒剂量兴奋脊髓
D.
可直接兴奋心脏、扩张血管
E.
收缩支气管平滑肌、利尿及刺激胃酸分泌
【单选题】苯甲酸钠咖啡因属
A.
镇静催眠药
B.
解热镇痛药
C.
抗心绞痛药
D.
全麻药
E.
中枢兴奋药