()是指执行基金管理人的投资指令，办理基金名义的资金来往的结算账户。A．资产保管 B

句型转换。

1. Chinese people invented the abacus in the sixth century. (改为被动语态)

    The abacus                                      in the sixth century by Chinese people.

2. I don't like the movie. The movie is very boring. (合并为含有定语从句的复合句)

    I don't like the movie                                      very boring.

3. I used to have long curly hair. (改为一般疑问句)

    __________ you __________ to have long curly hair?

4. Few people understood what he said at the meeting. (改为反义疑问句)

    Few people understood what he said at the meeting, __________ __________?

5. Mr. King is too busy to go to the concert. (改为同义句)

    Mr. King is ___________ busy ___________ he can't go to the concert.

釉质中羟磷灰石晶体的分子式是

A．Ca₆(PO₄)₂(OH)₁₀

B．Ca₂(PO₄)₆(OH)₁₀

C．Ca₆(PO₄)₁₀(OH)₂

D．Ca₁₀(PO₄)₆(OH)₂

E．Ca₁₀(PO₄)₂(OH)₆

地下开采时，倾角为7º的煤层属煤层。（）

A．近水平煤层；

B．缓倾斜煤层；

C．倾斜煤层；

D．急倾斜煤层。

按证券的性质不同，证券市场可分为( )。

A．场内市场

B．股票市场

C．场外市场

D．债券市场

进吸收塔溶液的（），会使粗氢气中的二氧化碳超标

A、循环量大

B、碳酸氢钾含量低

C、二乙醇胺含量高

D、碳酸钾含量低