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【单选题】
为了防止在开启或关闭玻璃容器时发生危险，下列瓶塞中不适宜作为盛放具有爆炸危险性物质的玻璃容器的瓶塞的是()。A.
软木塞
B.
磨口玻璃塞
C.
胶皮塞
D.
橡胶塞
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皮皮学刷刷变学霸
举一反三
【单选题】Which of the following is NOT mentioned as oneof the reasons for ineffective meetings?
A.
.The leader fails to do the right things to ensure theefficiency of the meeting.
B.
The environment of the meeting is not goodenough.
C.
People do not value time proper.
D.
The participants of the meeting are not active.
【简答题】冷热水管道上、下平行安装时热水管应在冷水管______方;垂直平行安装时热水管应在冷水管_______侧。
【单选题】Oneof the reasons for the great success of the film is _____ it brings back thehappy memories of our childhood.
A.
why
B.
whether
C.
where
D.
that