Not once in my life had I been able to look a male friend _____ the eye and say the same thing.
A. on
B. in
C. into
D. from
查看答案
___________, Geoffrey's illness proved not to be as serious as we had feared.
A. To our relief
B. To our regret
C. To our sadness
D. To our satisfaction
He was so curious to know what was in the letter that he could not _________ himself _____ opening it.
A. protect... from...
B. prevent... from...
C. restrain...from...
D. restrict...from...
生态因子中的生物因子主要包括
A. 地形因子
B. 植物因子
C. 动物因子
D. 人为因子
植物通过暗反应固定二氧化碳的途径主要有
A. C3途径
B. C4途径
C. 光合磷酸化
D. 景天酸代谢途径
微信支付 
支付宝支付