我国争取到2020年,全社会研究开发投入占国内生产总值的比重提高到()以上。
A.2%
B.4%
C.2.50%
D.3%
参考答案:C
Make sentences. (连词成句)
1. everybody, how, doing, is (?)
2. is, what, your, doing, mom (?)
3. speak, I, can, dad, your, to (?)
4. is, an, writing, he, e-mail (.)
鸡皮刺螨的发育阶段不包括()
A.虫卵
B.幼虫
C.若虫
D.蛹
E.成虫