单项选择题：点火正时是影响燃料燃烧的关键。据有关部门测试，点火正时提前或延迟20，油耗将增加（）

题型：阅读理解

阅读理解。

Is human blood all the same? "Yes." You may say. "It's all red."

Well, it's not as simple as you might think.

Blood is made up of different parts, such as red blood cells (红血球), white blood cells and platelets (血小板).

Two chemical molecules (分子) on the red blood cells make people's blood different. Scientists mark one

molecule "A" and the other molecule "B". According to which and how many molecules are on the red cell,

scientists divide blood into four types: A, B, AB and O.

Your blood type will stay the same all your life.

Scientists have been wondering if there are some links (联系) between people's blood types and their

personalities, but they are not certain.

But some say that people with the same blood type may have things in common.

What's your blood type? Do you have family members or friends who are of the same type as you?

Read the following.

People with Type A: They look peaceful from the outside. But they ask too much of themselves that

they may be very nervous inside. They get happy or sad easily. Sometimes they are shy but always very

careful. They can easily win people's trust.

People with Type B: They have strong minds. Once they start a task, they don't give up easily. They'll

try their best to finish it and do it well. Type B people always try to make themselves different from others.

They want to do things in their own way.

People with Type AB: They are maybe the strangest among all blood types. They can be both open and

shy, noisy and quiet at the same time! They are responsible and always ready to help others.

People with Type O: They are open and good at making friends. They always start tasks but don't always

finish them. They have lots of new ideas and love to be the centre of attention. They always strongly believe

in themselves.

1. The blood types are decided by the kind and amount of molecules _______.

2. Scientists are _______ about the relations between blood and personalities.

3. If you are with Type B, you might _______.

4. If a person is both open and shy, noisy and quiet at the same time, he or she might be with _______ blood.

5. The best title of the passage is _______ and Personalities.

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题型：单项选择题

为达到把a、b中的值交换后输出的目的，某人编程如下：
Private Sub Command1_Click()
a%=10:b%=20
Call swap(a,b)
Print a,b
End Sub
Private Sub swap(ByVal a As Integer，ByVal b As Integer)
c=a:a=b:b=C
End Sub
在运行时发现输出结果错了，需要修改。下面列出的错误原因和修改方案中正确的是( )

A．调用swap过程的语句错误，应改为Call swap a,b
B．输出语句错误，应改为Print"a","b"
C．过程的形式参数有错，应改为swap(ByRef a As Integer,ByRef b As Integer)
D．swap中3条赋值语句的顺序是错误的，应改为a=b:b=c:c=a

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题型：单项选择题

在从事自身业务的同时，根据保险人的委托，向保险人收取保险代理手续费，在保险人授权的范围内代办保险业务的单位，被称为（）。

A．保险兼业代理机构

B．专业保险代理机构

C．综合保险代理机构

D．个人保险代理机构

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题型：选择题

图中L是绕在铁心上的线圈，它与电阻R、R₀、电键和电池E可构成闭合回路。线圈上的箭头表示线圈中电流的正方向，当电流的流向与箭头所示的方向相同时，该电流为正，否则为负。电键K₁和K₂都处在断开状态。设在t=0时刻，接通电键K₁，经过一段时间，在t=t₁时刻，再接通电键K₂，则能较正确地表示L中的电流I随时间t变化的图线是下面给出的四个图中的哪个图