材料QT400—18,其中数字400和18表示()
A.抗压强度和伸长率
B.抗弯强度和收缩率
C.抗拉强度和伸长率
D.抗剪强度和收缩率
参考答案:C
China ____ a large amount of money and clothing to Haiti when they were struck by the terrible earthquake. [ ]
A. gave up
B. gave out
C. gave away
D. gave off
当前的非线性编辑系统中核心的部分是()。
A.压缩与解压缩子系统
B.存储子系统
C.软件子系统
D.输入输出子系统