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问题
单项选择题
与文案调查法相比，实验调查法的特点是（）。
A.调查时间短
B.调查成本低
C.调查结论根据有说服力
D.收集资料多
答案
参考答案：
C
填空题
根据图片提示补充句子，使句子意思完整。
1.
My sister __________ to school by __________.
2.
Mike's aunt __________ a __________.
3.
I __________ a __________ yesterday.
4.
Sarah __________ do the __________ at home.
5.
__________ does she feel? She feels __________.
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问答题 简答题
简述骨转移灶呈现"冷区"的主要原因。
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My sister __________ to school by __________.
Mike's aunt __________ a __________.
I __________ a __________ yesterday.
Sarah __________ do the __________ at home.
__________ does she feel? She feels __________.