皮皮学，免费搜题
登录
搜题
【单选题】
What is the root causeof desertification？A.
poor farming
B.
overpopulation
C.
radical climate change
D.
disappearance of rare plant species
拍照语音搜题，微信中搜索"皮皮学"使用
参考答案：
参考解析：
知识点：
皮皮学刷刷变学霸
举一反三
【单选题】What did the girls tell the teacher for being late?
A.
They got up late.
B.
They could not get a taxi.
C.
Their taxi had a flat tire.
【单选题】如图 1 ( a )、( b )所示为甲、乙两辆电动小车作匀速直线运动的 s - t 图像,比较两车运动的快慢,则
A.
甲车运动一定快
B.
乙车运动一定快
C.
乙车运动可能快
D.
甲、乙车运动快慢相同
【单选题】—I have difficulty learning English_______. —You may read after the tapes or ask the teacher for help. [ ]
A.
grammar
B.
pronunciation
C.
rules
D.
books
【单选题】how to work out the difficult physics problem ,he asked the teacher for help .
A.
Not to know
B.
Not knowing
C.
Knowing not
D.
Not known
【单选题】— _do you study for your math test? —By working with my classmates or asking the teacher for help. [ ]
A.
How
B.
What
C.
When
D.
Why
相关题目：