棉纤维的生长可以分为伸长期、（）、（）三个时期，成熟差的棉纤维胞壁较（）。
参考答案：加厚期；转曲期；薄
The way ______ was thought of by him ______ the experiment was similar to the way _____ you carried it out.
A．that, doing, which
B．which, of doing, in which
C．what, to do, \
D．it, of doing, that
采用（）技术，可以真正减小而不是转移开关损耗，提高系统效率。
A.硬开关
B.软开关
C.快开关
D.慢开关
