【判断题】有机溶剂只会经口鼻进入人体,只要对的使用呼吸防护面具,就可以有效防止危害健康。
【单选题】It is the author's view that in human civilization, agriculture ______.
A.
is the most important step man has ever made
B.
is only less important than the domestication of animals
C.
and fire are of the same importance
D.
can be ranked in importance with the invention of machines
【判断题】我国4G系统主要使用的频段是1.8GHz。
【单选题】Many people think that English is _____ of all the subjects.
【简答题】____ Many countries import most of the oil they use.
【判断题】The most import thing for a seller on eBay is the feedback.
【多选题】在建设工程招投标中,常见的招标有( )。
【单选题】For most importers, they prefer ______ import ______ FBO basis.
【单选题】which of the following methods is the most import for health assessment ( )
B.
laboratory examination