【简答题】骨料在混凝土中起 作用,能够传递应力,抑制收缩,防止开裂,使混凝土具有更好的 。
【单选题】应该承认,好读书这个习惯的养成是很重要的。 根本不读书 不喜欢读书,那么, 说什么求甚解或不求甚解就都毫无意义了。 不读书就不了解什么知识,不喜欢读书也就不能用心去了解书中的道理。
【简答题】用白光垂直照射一厚度为 400 nm 、折射率为 1.50 的空气中的薄膜表面时,反射光中被相干加强 的可见光波长为 nm
【单选题】Why does Sam want to target the 46-55 age group?
A.
They have more buying power.
B.
They are vey health conscious.
C.
They tend to enjoy sports more.
【单选题】Why does Joe want to have a talk with Lucinda and Sam?
A.
Because rumors of their love are spreading around.
B.
Because they have made a great progress.
C.
Because they are the champions of sales this week.
D.
Because today is a good day.