[主观题]后张法构件的第一批损失σⅠ由________构成，第二批损失σⅡ由________构成。
[主观题]求函数y=x3-3x2-9x＋1的极值．
[试题]曲线y=x2与y=4—x2所围成的图形的面积为_________．
[主观题]We will agree to sign the new contract provided that you increase our salaries by 5%.
[主观题]偏心受压构件按破坏特征分为___________—和___________。
[试题]设f(x)在[0，1]上可导，且满足f(1)=∫01xf(x)dx，证明：必有一点ξ∈(0，1)，使得ξf(ξ)+f(ξ)=0．
[主观题]当h=800mm时，附加偏心距ea=___________。
[主观题]H．is______(refuse) to come to our wedding upset the new couple.
[试题]设x∈[-1，1]，则arcsinx+arccosx=_________．
[主观题]求由曲线y=ex，y=e-x及x=1所围成的平面图形的面积以及此平面图形绕x轴旋转一周所成的旋转体的体积Vx.
[主观题]曲线y=x3-3x+2的拐点是__________。
[试题]求微分方程dy/dx +y=e-x的通解．
[主观题]钢筋的力学性能指标包括___________、___________、___________、___________，其中___________和___________是检验钢筋塑性性能的两个指标。
[主观题]设函数f(x)=ax3＋bx2＋cx＋d，问常数a，b，c满足什么关系时，f(x)分别没 有极值、可能有一个极值、可能有两个极值?
[主观题]求曲线y=2-x2和直线y=2x＋2所围成图形面积．
[主观题]H．e developed computer software to handle complicated______(finance) transactions.
[主观题]We sent the letter by airmail （以便他们能及时收到）.
[主观题](本题满分8分) 设函数z=z(x，y)是由方程x+y3+z+e2x=1所确定的隐函数，求dz．
[主观题](本题满分10分) 设20件产品中有3件次品，从中任取两件，在已知其中有一件是次品的条件下，求另一件也是次品的概率．
[主观题]The government official said that the new tax rates would come into ______ (effective) from April.
[主观题]求xyy=1-x2的通解．
[主观题](本题满分8分) 设有5封信及标号为1～5的5个信筒，将这5封信投入任意-个信筒是等可能的，求下列事件的概率． (1)A=“5个信筒里各有-封信”； (2)B=“4号信筒里只能投指定的-封信，其余信筒各-封信”．
[主观题]简述大、小偏心受压构件的产生条件和破坏特征。
[单选题]下列可引起漏出液的疾病是( )A．胸膜炎B．肾病综合征C．肝硬化D．心功能不全E．肝静脉闭塞症(Budd—Chiari氏综合征)
[主观题]F．riends play an important part in our lives, but we don&39;t know much about how to make friends. As we get to know people, we consider things like age, races, looks and social positions. Thus it is more difficult for people to become friends if the
[主观题]The new library is three times as large as the old one.
[主观题]A． lot of houses were seriously damaged in the earthquake, so that thousands of people were left homeless.
[单选题]D．irections According to the given information,you are required to write A Letter to a Friend in about 1OO words. The letter is required to be written on the Answer Sheet.情景：假定你是北京大学计算机专业新生赵华，入学几个月后，给朋友李玲写一份信。收信人地址：安徽省合肥市芙蓉路 632 号（邮编：230601）要求：按照完整英文
[主观题]The photo reminds me of the happy time I spent in Shanghai.
[主观题]With so many people to care about her, she feels very happy.