下列对于我国自然资源基本特征的叙述，正确的是（ ） A．自然资源极度缺乏 B．自

将一个电阻为60Ω，满偏电流为500的电流表表头改成如图所示的两个量程的电压表，量程分别为3V和15 V，试求和的阻值。

土地革命时期，中国社会最基本的政治特征是( )。

A．中国由内战向全民族抗战过渡

B．国共 * * 的十年对峙

C．国民党 * * 确

D．民族矛盾上升为主要矛盾

When solving the problem a second time, you’d better be more careful____you made a mistake.

A．in case

B．where

C．in which

D．that

Which of the following statements about the risks associated with investing in bonds is least accurate （）

A. Credit risk is the likelihood that an investor will be unable to sell the security quickly and at a fair price.

B. Reinvestment risk is the uncertainty about the rate at which cash flows from the security can be reinvested.

C. Volatility risk is the risk that the price of a bond with an embedded option will decline when expected yield volatility changes.

(2)

A．COM

B．RJ-45

C．USB

D．PS/2