手提防爆探照灯具有深度潜水能力，能在（）米水下长时间正常工作_爱下问搜题

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问题单项选择题

手提防爆探照灯具有深度潜水能力，能在（）米水下长时间正常工作。

A.50

B.100

C.200

D.300

答案

参考答案：B

补全对话，情景问答

从方框中找出与所给句子相匹配的选项。

A. You must drive a car on the right-hand side of the road in most parts of China.
B. Because it can help us keep healthy.
C. Before you cross the road.
D. You must drive a car on the left-hand side of the road.
E. You will get a fine.

( )1. Cycling is a popular sport.
( )2. You must look left and right.
( )3. It's right.
( )4. If you drive a car in Hong Kong.
( )5. If you don't obey the traffic rules.

选择题

在密闭容器中进行下列反应M(g)+N(g)R(g)+2L：反应符合如图所示的图象．下列叙述正确的是

A．正反应吸热，L是气体

B．正反应吸热，L是固体

C．正反应放热，L是气体

D．正反应放热，L是固体或液体