Which of the following forms of cell-to-cell communication would allow one cell to directly affect a cell the furthest distance from it? A: juxtacrine signals B: hormones C: paracrine factors D: immune synapses

Making noise_____in class. A: not allow B: isn’t allow C: isn’t allowed D: doesn’t allow

No one (allow) _____ to take any reading materials out of the reading room. A: allow B: is allowed C: to allow D: allowed

“给与3.5%的商业折扣”可以翻译为： A: to allow a discount of 3.5% B: to allow a special discount of 3.5% C: to allow a trade discount of 3.5% D: to allow a trade discount by 3.5%

3. What kinds of words have strong forms and weak forms?

下面语句的结果是 order allow deny allow from all

Morphemes may have different forms, the variant forms of a morpheme are called its ____.

If time _____, we shall go there tomorrow. A: allow B: allows C: allowed D: will allow

4. Why is it important to know and to be able to use strong forms and weak forms of certain words?

Order allow,deny allow from 219.204.253.8 上面的语句表示只允许219.204.253.8通行。