【简答题】土壤分为一类土、二类土、三类土和四类土。在城市市区和市郊区一般采用( )类土。
【单选题】替代表皮起着次生保护作用的次生保护组织 。
【判断题】普氏分类法将土壤和岩石划分为一二类土、三类土、四类土、软石、次坚石、普坚石和特坚石等七大类。
【单选题】听力原文:M: Hi, Jane. Um... do you know how to get in touch with Jim? W: Oh, John. I haven't seen Jim for a while. But you can try this phone number? Who will make a telephone call?
【单选题】听力原文:M: Hey, Jane. What' s so interesting? W: What? Oh, hi, Tom. I' m reading this fascinating article on the societies of the Ice Age. M: The Ice Age? There weren't any societies then, just groups of...
A.
They lived in groups and were cave people.
B.
There were societies in Ice Age.
C.
They were advanced in arts.
D.
They had a smart way of building shelters.
【单选题】关于阶梯剖视图画法,错误的说法是:
B.
在剖视图中,各个剖切平面的转折处不应画分界线
【判断题】八选一数据选择器 74LS151 有三个地址输入端 A 2 、 A 1 、 A 0 ,八个数据输入端 D 0 ~D 7 , 一个数据输出端 Y 。
【单选题】听力原文:M: Hey, Jane. What's so interesting? W: What? Oh, hi, Tom. I'm reading this fascinating article on the societies of the Ice Age during the Pleistocene period. M: The Ice Age? There weren't any so...
B.
They traveled in groups.
C.
They had an advanced language.
D.
They ate mostly fruit.
【多选题】关于阶梯剖视图画法,错误的说法是( )。
B.
在剖视图中,各个剖切平面的转折处可以画分界线
【多选题】关于阶梯剖视图画法,错误的说法是( )。