题目内容

The boys looked for the ball for a while in the playground, but finally gave are went home.

A. up
B. out
C. away
D. off

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血液氨主要通过何种途径来清除( )

A. 合成谷氨酰胺
B. 合成尿素
C. 尿中排泌
D. 从汗液排
E. 粪便

( )是指在预收的物业服务资金中按约定比例或者约定数额提取酬金支付给物业管理企业,其余全部用于物业服务合同约定的支出,结余或者不足均由业主享有或者承担的物业服务计费方式。

A. 包干制
B. 酬金制
C. 报酬制
D. 包工制

One day some of Bill's friends saw ______ in his garden.

A. a very big piece of wood
B. a very nice target
C. a hole
D. a very beautiful picture

According to the passage, the difference between a gas and a liquid under normal conditions on Earth is that the liquid ______.

A. is affected by changes in pressure
B. has a permanent structure
C. forms a free surface
D. is considerably more common

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