Women______-drink more than two cups of coffee a day have a greater chance of having heart disease than those _______- don’t. A. who; / B. /; who
We first met on a train in 2000. We both felt immediately that we ______ each other for years. A. knew B. have known C. have known D. know
法国议会是法国的立法机关。下列有关法国议会的说法,正确的是 ( ) ①是最高国家权力机关 ②从原则上说,两院在立法方面有同等的权力
如图,在△中,,,则△的面积是( ) A. B.12 C.14 D.21
某氧原子的质量为a g,12C原子的质量为b g,且NA表示阿氏常数,下列说法中正确的是 A.氧元素的相对原子质量为12a/b B.1mol该原子质量为aNA
If he had not gone out in the storm _____. A.he will be alive now B. he would be alive now C. he would have been alive now
下列与细胞器相关的叙述中,正确的是( ) A.蓝藻细胞中有的酶在核糖体上合成后,再由内质网和高尔基体加工 B.分泌蛋白合成旺盛的细胞中,高尔基