皮皮学，免费搜题
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【单选题】
以下不属于口头报告优点的是: ( )A.
短,见效快,节省决策者的时间与精力
B.
听者对报告的印象深刻
C.
口头汇报后可以直接进行沟通和交流,提出疑问, 并做出解答等
D.
可以有更多的空间自由发挥
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】设函数【图片】在点【图片】处的两个偏导数存在，则【图片】是【图片】在点【图片】处取得极值的（ ）
A.
充分但非必要条件
B.
必要但非充分条件
C.
充分必要条件
D.
既不是必要，也不是充分条件
【单选题】—What do you usually do on Sunday? —I usually volunteer at an animal hospital the animals.
A.
take risks
B.
to take risks
C.
look after
D.
to look after
【单选题】He asked what I ____that poor animal.
A.
agreed with
B.
did with
C.
called on
D.
took care
【简答题】设函数【图片】,则【图片】在点【图片】的值为
【单选题】—What does this modern-day dinosaur look like? —The tongue of this animal can be extended _____ of its body.
A.
more than twice the length
B.
twice more than the length
C.
more than the length twice
D.
more twice than the length
【简答题】What kind of animal is the coyote described as?
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