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【判断题】
立筋的主要作用是承担支座产生的负弯矩。A.
正确
B.
错误
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】新药长期毒性试验,描述错误的是:
A.
一般行为活动宜每天观察记录
B.
试验中途允许改变剂量
C.
发现有阳性指标应加大观察密度
D.
啮齿类动物长期毒性试验中组均值的意义通常大于单个动物数据的意义
【简答题】已知函数y=f（x）是偶函数，当x＞0时，有 f(x)=x+ 4 x ，且当x∈[-3，-1]，f（x）的值域是[n，m]，则m-n的值是？
【单选题】Had you prepared for your lecture, you______ more fluently.
A.
should have spoken
B.
would have spoken
C.
would speak
D.
had spoken
【简答题】已知f（x）是奇函数，g（x）=f（x）+4，g（1）=2，则f（-1）的值是______．
【简答题】东巴文字是目前世界唯一存活着的象形文字,成为文字起源和发展的( )。
【简答题】某噬菌体可以携带供体DN段进入受体细胞中,但不能进行复制,这种噬菌体称为__________。
【简答题】I'm ashamed _____________ such a thing. [A] that you would have done [B] that you should have done [C] of what you are doing [D] to what you were doing
【单选题】There was a lot of fun at the party. You ________, but why didn't you? [ ]
A.
should come
B.
ought to have come
C.
may have come
D.
must have come
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