对生长素生理作用概括不准确的是[ ]
A．生长素能促进果实成熟
B．生长素能促进扦插枝条生根
C．生长素能促进果实发育
D．生长素能促进植物生长
答案：A
There is ____ as a free dinner in this world, as the saying goes, "No pains, no gains."[ ]
A. no such a good thing
B. such no good thing
C. no such good thing
D. such no a good thing
电镀挂具绝缘不宜用下列哪种方法（）。
A、包扎聚氯乙烯薄膜
B、浸过氯乙烯清漆
C、涂刷塑料涂料
D、涂蜡
