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问题 单项选择题

某土坝工程级别为2级，采用黏性土填筑，其设计压实度应为( )。

A．90%～92%

B．92%～96%

C．96%～98%

D．98%～100%

答案

参考答案：D

解析：

黏性土的填筑标准：1级、2级坝和高坝的压实度应为98%～100%，3级中低坝及3级以下的中坝压实度应为96%～98%。

单项选择题

关于脾脏的描述有误的是（）

A.T、B细胞定居的场所

B.免疫应答发生的场所

C.sIgA合成的主要场所

D.胚胎期的造血器官

E.血液净化器官
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单项选择题

In the dining room of my grandfather’ s house stood his heavy clock. Meals in the dining room were a (21) for our four generations to become one. My grandfather’ s clock always stood like a trusted old family friend, (22) us playing jokes and tellingstories, which was already a (23) of our life.

When I was a child, the old clock interested me. I watched and listened to it during (24) I was surprised how at (25) times of the day, the clock would strike three times, six times or more, with a wonderful great (26) that echoed throughout the house. The clock chimed year after year, a part of my (27) , a part of my heart.

Even more (28) to me was my grandfather’s special action each day. He meticulously (29) the clock with a special key each day. The key was magic to me. It (30) our family’ s magnificent clock ticking and striking all year round.

29（）

A.busy 

B.urgent 

C.happy 

D.different
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