脊髓灰质炎病毒侵入人体主要通过()
A.呼吸道传播
B.血液传播
C.皮肤感染
D.神经传播
E.消化道传播
参考答案:E
Among Asimov’s most famous works of science fiction, one ______he won an award, was the Foundation Trilogy.
A.of whom
B.of which
C.for whom
D.for which
“三人行,必有我师”,这说明了人际关系的( )。
A.合力功能
B.激励功能
C.交流信息功能
D.互补功能