皮皮学，免费搜题
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搜题
【单选题】
保持感光度效应不变,摄影距离增加1倍后流量应为原来的A.
1倍
B.
2倍
C.
3倍
D.
4倍
E.
5倍
拍照语音搜题，微信中搜索"皮皮学"使用
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参考解析：
知识点：
皮皮学刷刷变学霸
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【简答题】若x 2 =x，则x=______，若x 3 =x，则x=______，若x 3 =x 2 ，则x=______．
【单选题】My sister is very hard-working. She is not only good at her subjects but also she often helps my parents . [ ]
A.
do the dish
B.
do chores
C.
do laundry
D.
do homework
【单选题】My sister is very interested in singing, and ______.
A.
so is my brother
B.
so am I, too
C.
he is so
【简答题】长期目标是指时间跨度为______的目标，短期目标是指时间跨度在______的目标。