【简答题】简述写出屏蔽门门体结构的组成及各自的作用。
【单选题】The writer was _____ in his writing that he forgot to flick the ashes from his cigar.
【单选题】He grew more and more absorbed in his work, ______ he almost forgot his meals.
A.
that to such an extent
B.
to an extent such that
D.
such that to an extent
【单选题】He ______ his homework at home yesterday.
【简答题】在使用共阴极 LED 数码管时,“公共端”应接 , a~g 应接输出 有效的显示译码器,这样才能显示 0~9 是个数字。
【简答题】在近代中国,的侵略使中国发展成为资本主义国家。