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问题
判断题
水电站自动调节渠道通常运用渠首闸门控制渠道中的水位和流量。
答案
参考答案：错
补全对话，情景问答
Match. 将问题和答语匹配起来。
( ) 1. Does a lion have a trunk?
( ) 2. Where does a fish live?
( ) 3. What do giraffes eat?
( ) 4. What can a cow do?
( ) 5. Where is Danny?
a. He is under the desk.
b. It can walk.
c. In a river.
d. No, it doesn't.
e. They eat grass.
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单项选择题
某技师在使用离心铸造机进行铸造时忘记调整离心机臂两端平衡，可能造成
A．毛刺
B．冷隔
C．偏析
D．冷热裂
E．砂眼
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