多核苷酸中磷酸和戊糖之间的连接键为()。
A. 肽键
B. 氢键
C. 糖苷键
D. 磷酸酯键
E. 3’.5’一磷酸二酯键
Nadya Fouad suggests in the last paragraph that__________．
A. managers be fully responsible for the uncivil work climate
B. the corporation make women more confident and wiser
C. the company help women settle their family problems
D. the corporation offer women the chance of promotion
The previous studies explain that there are few women in STEM fields because__________．
A. women are unwilling to compete with men
B. women are better promoted in other fields
C. women are not as intelligent as men
D. women are not fond of such fields
单核苷酸由核苷和磷酸缩合而成，其连接键为()。
A. 肽键
B. 氢键
C. 糖苷键
D. 磷酸酯键
E. 3’.5’一磷酸二酯键
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