【判断题】由于细胞膜和液泡膜的差异通透性及主动运输的作用,胞膜和邻近地区保持一定的电位差,叫作静止电位。
【多选题】下列加工方法中属于切削加工方式的是( )。
【单选题】下列螺纹加工方法中,属于无切削加工方式的是()。
【判断题】国际贸易按传统的定义,仅指货物的进出口,发展到今天,其业务范围已经扩大到包括服务的进出口。
【判断题】发生交通事故造成人员受伤时,要保护现场并立即报警。
【单选题】My most famous relative of all, ____ who really left his mark on America, was Rob Sussel, my great-grandfather.
【单选题】What scientists Johan Feenstra and Rob Hayes did was that______.
A.
they made an electronic newspaper
B.
they created a piece of videoscreen-like paper
C.
they made a tiny piece of primitive e-paper
D.
they invented the electrowetting technology
【单选题】The story tells us that the old woman ______.
A.
was accused of stealing in a store
B.
was robbed while doing shopping
C.
accused the store of wronging her
D.
stole a Christmas card
【简答题】Rob was d_________ (悲痛欲绝)by the news of his lover's death.
【简答题】水库调洪计算列表试算法计算时段可变,半图解法计算时段( )。