引力波().
A. 能够屏蔽
B. 不能屏蔽
C. 只能部分屏蔽
D. 可用金属屏蔽
Something that is unique is__________
A. special because there is only one
B. valuable because it is very old
确诊恶性肿瘤必不可少的检查方法是
A. 症状和体征
B. 有关的化验阳性
C. B超检查
D. CT检查
E. 病理学检查
When you hear laughter, someone probably saidsomething _________.
A. interesting
B. funny