更多"If a and b are the lengths of the l"的相关试题:
[单项选择]If a and b are the lengths of the legs of a right triangle whose hypotenuse is 10 and whose area is 20,what is the value of (a +b.2
A. 100
B. 120
C. 140
D. 180
E. 200
[单项选择]A. Yes, all right. B. Class is over now.
C. How time flies! D. Yes, let’s hurry.
[单项选择]A. Everything is all right. B. It’s late.
C. I can do everything. D. You are here.
[单项选择]A. They always hold their babies on the right.
B. They hold their babies on the left at the time of stress.
C. They sense that their babies are comfortable while listening to mother’s heartbeat.
D. They miss the critical period and don’t have the instinct to hold their babies on the left.
[单项选择]A. The man was quite all right.
B. The woman was late for coming.
C. The woman asked the man to wait.
D. The man was annoyed by her late coming.
[单项选择]A. I think you are right. B. I am full.
C. Very nice. D. I am hungry.
[单项选择]
B
If you do not use your arms or your legs for some time, they become weak; when you start using them again, they slowly become strong again. Everyone knows this, and nobody would think of questioning this fact. Yet there are many people who do not seem to know that memory (记忆) works in the same way. When someone says he has a good memory, he really means that he keeps his memory in practice by often exercising it.
If a friend says that his arms and legs are weak, we know that it is his own fault (过错). But if he tells us that he has a poor memory, many of us think that his parents are to blame (责怪), and few of us think that it is as much his own fault as if it was his arms or legs that were weak.
Have you ever noticed that people who cannot read and write usually have better memories than people who can This is because those illiterate people have to remember things; they cannot write them down in a little notebook. They have to r
A. Right.
B. Wrong.
C. Doesn’t Say.
