秋冬季腹泻的病原体是
A．轮状病毒
B．柯萨奇病毒
C．致病性肠埃希菌
D．白色念珠菌
E．金黄色葡萄球菌
参考答案：A
.
—I can’t find Mr. Smith. Where did you last see him this morning?
—It was in the hotel _______ he stayed.
A．that
B．where
C．which
D．since
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