题目内容

淋巴管道包括

A. 毛细淋巴管
B. 淋巴管
C. 淋巴干
D. 淋巴导管
E. 胸导管

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He talked about a hero ____ no one had ever heard.

A. of whom
B. from whom
C. about that
D. who

Combine the following sentences into an attributive clause.(将下列句子合并成一个定语从句。)1. The woman is our geography teacher. You saw her in the park.__________________________________________________________2. The magazine is mine. He has taken it away.__________________________________________________________3. The play was wonderful. We saw it last night.__________________________________________________________4. The fan is on the desk. You want it.__________________________________________________________5. The man is in the next room. He brought our textbooks here yesterday.___________________________________________________________________

携带有一个自主状态的F因子的菌株用

A. F+表示
B. F-表示
C. Hfr表示
D. F′表示。

既能以较高频率转移性因子,又能以较高频率转移细菌染色体片断的细菌是

A. F+菌株
B. F-菌株
C. Hfr菌株
D. F’菌株

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