正常人粪便镜检不可见的成分是（）
A.红细胞
B.白细胞
C.淀粉颗粒
D.草酸钙结晶
E.细菌
参考答案：A
What is Lynn _________ to do?[ ]
A. go
B. goes
C. going
A new survey released by Yale University finds that Americans trust scientists most when ______ comes to information on climate change.
A．that
B．this
C．it
D．there
