唇腭裂可能的发病因素是()。
A.营养
B.遗传
C.感染
D.创伤
E.放射线
参考答案:A, B, C, D, E
用所给单词的正确形式完成句子。
1. Sandra Clark _____ (eat) eggs and apples every day.
2. Some _____ (strawberry) are on the table.
3. My sister _____ (like) bread and milk for breakfast.
4. We should (应该) eat _____ (good) every day.
5. Tony likes _____ (run).
按照流的方向来分,I/O流包括输入流和 【8】 。