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【单选题】
破火山口是下列哪种原因形成的？（）
A.
猛烈喷发时爆炸；
B.
自边缘裂隙喷出的熔岩堆积；
C.
几次喷发的错位；
D.
紧跟爆发之后的下陷
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参考答案：
参考解析：
刷刷题刷刷变学霸
举一反三
【单选题】The Exploding Lakes of Cameroon What comes to mind when youthink of a lake? You probably imagine a pretty scene with bue water, brds, and fish. FOr the people in the northwestern Cameroon, however,the...
A.
Water will flow down the hills.
B.
Poisonous gases will bereleased suddenly.
C.
A strong wind will rise from the lakes.
D.
The volcanoes will come to life.
【单选题】The Exploding Lakes of Cameroon What comes to mind when you think of a lake You probably imagine a pretty scene with blue water, birds, and fish. For the people in the northwestern Cameroon, however,...
A.
the gases rise to the top and mix with air.
B.
people from the villages turn over the water.
C.
scientists have put in a computer system.
D.
they have more gases trapped at the bottom than other crater lakes.
【单选题】药物在生物膜一侧形成离子障时，说明 ：
A.
离子型药物易跨膜，不易留在膜一侧
B.
非离子型药物易跨膜，离子型药物不易跨膜
C.
离子型和非离子型药物都易跨膜
D.
离子型和非离子型药物都不易跨膜
E.
非离子型药物不易跨膜，易留在膜一侧
【单选题】胃窦部有一圆形溃疡，直径2cm，溃疡较浅，边缘不整齐，外形火山口状。其诊断最可能为（）.
A.
急性胃溃疡
B.
胃溃疡病
C.
应激性溃疡
D.
早期凹陷型胃癌
E.
溃疡型胃癌