关于操作系统的描述中，正确的是( )。 A．只管理硬件资源、改善人机接口 B．驱

近视眼要配戴______镜才能矫正．

直流排流保护效果评定指标规定：选择直接排流方式时，正电位峰值比为大于（）％。

A.60

B.85

C.80

D.75

I tried to call up my relatives in Kyrgyzstan where an unrest(动乱) was going on, but couldn’t _________.

A．go through

B．get over

C．get along

D．get through

下列说法中正确的是( )．

A．吸盘能牢牢吸在玻璃上，说明分子间存在引力
B．尘土飞扬，说明分子在不停地运动
C．弹簧能够被压缩，说明分子间有空隙
D．糖在热水中溶解得快，说明温度越高，分子的热运动越剧烈

A $1000 face, 10-year, 8.00 percent semi-annual coupon, option-free bond is issued at par (market rates are thus 8.00 percent). Given that the bond price decreased 10.03 percent when market rates increased 150 basis points (bp), which of the following statements is TRUE If market yields:（）

A. decrease by 150bp, the bond’s price will decrease by more than 10.03%. 

B. decrease by 150bp, the bond’s price will increase by 10.03%. 

C. decrease by 150bp, the bond’s price will increase by more than 10.03%.