具有同质多晶的性质( )。 A．可可豆脂 B．Poloxamer C．甘油明胶 D

将白鼠乳腺细胞的细胞核移植到黑鼠的去核细胞中，形成重组细胞，由该细胞培育而成的小鼠身体的颜色应该是（ ）

A．黑白相间

B．白色

C．黑色

D．不能确定

如图甲所示，在空间存在一个变化的电场和一个变化的磁场，电场的方向水平向右（图甲中由B到C），场强大小随时间变化情况如图乙所示；磁感应强度方向垂直于纸面、大小随时间变化情况如图丙所示。在t=1s时，从A点沿AB方向（垂直于BC）以初速度v₀射出第一个粒子，并在此之后，每隔2s有一个相同的粒子沿AB方向均以初速度v₀射出，并恰好均能击中C点，若AB=BC=L，且粒子由A运动到C的运动时间小于1s。不计空气阻力，对于各粒子由A运动到C的过程中，以下说法正确的是

A．电场强度E₀和磁感应强度B₀的大小之比为3v₀：1

B．第一个粒子和第二个粒子运动的加速度大小之比为1：3

C．第一个粒子和第二个粒子运动的时间之比为π：2

D．第一个粒子和第二个粒子通过C的动能之比为1：5

国民资产负债统计中的固定资产和存货都按照统一的（）进行估计。

A．购进价格

B．固定价格

C．不变价格

D．当期市场价格

阅读理解。

     Do you want to live with a strong sense of peacefulness, happiness, goodness, and self-respect? The

collection of happiness actions broadly categorized as "honor" help you create this life of good feelings.

     Here's an example to show how honorable actions create happiness.

     Say a store clerk fails to charge us for an item. If we keep silent, and profit from the clerk's mistake,

we would drive home with a sense of sneaky excitement. Later we might tell our family or friends about

our good fortune. On the other hand, if we tell the clerk about the uncharged item, the clerk would be

grateful and thank us for our honesty. We would leave the store with a quiet sense of honor that we might

never share with another soul.

     Then, what is it to do with our sense of happiness?

     In the first case, where we don't tell the clerk, a couple of things would happen. Deep down inside we

would know ourselves as a type of thief. In the process, we would lose some peace of mind and self-respect.

We would also demonstrate that we cannot lie trusted, since we advertise our dishonor by telling our family

and friends. We damage our own reputations by telling others. In contrast, bringing the error to the clerk's

attention causes different things to happen. Immediately the clerk knows us to be honorable. Upon leaving

the store, we feel honorable and our self-respect is increased. Whenever we take honorable action we gain

the deep internal rewards of goodness and a sense of nobility.

     There is a beautiful positive cycle that is created by living a life of honorable actions. Honorable thoughts

lead to honorable actions. Honorable actions lead us to a happier existence. And it's easy to think and act

honorably again when we're happy. While the positive cycle can be difficult to start, once it's started, it's

easy to continue. Keeping on doing good deeds brings us peace of mind, which is important for our happiness.

1. According to the passage, the positive action in the example contributes to our _____.

A. self-respect

B. financial rewards

C. advertising ability

D. friendly relationship

2. The author thinks that keeping silent about the uncharged item is equal to _____.

A. lying

B. stealing

C. cheating

D. advertising

3. The phrase "bringing the error to the clerk's attention" (in para. 5) means _____.

A. telling the truth to the clerk

B. offering advice to the clerk

C. asking the clerk to be more attentive

D. reminding the clerk of the charged item

4. How will we feel if we let the clerk know her mistake?

A. We'll be very excited.

B. We'll feel unfortunate.

C. We'll have a sense of honor.

D. We'll feel sorry for the clerk.

5. Which of the following can be the best title of this passage?

A. How to Live Truthfully

B. Importance of Peacefulness

C. Ways of Gaining Self-respect

D. Happiness through Honorable Actions

下面梯形图中，MOVB功能指令中，R136和R70分别代表（）。

A.输入数据地址和输出数据地址

B.传送源地址和传送目标地址

C.当前位置和目标位置

D.预置地址和寄存器地址