【简答题】下列命题中所有假命题的序号为______. ①y=sinxcosx的周期为π,最大值为 1 2 ; ②若x是第一象限的角,则y=sinx是增函数;③在△ABC中,若sinA=sinB,则A=B; ④f(x)=sinx+cosx既不是奇函数,也不是偶函数; ⑤ y=cos(2x+ π 4 ) 的一条对称轴为 x=- π 8 .
【单选题】For McDonalds, what is the key point to solve the current problem?
A.
Improving products' diversity.
B.
Building strong brand position.
C.
Promoting main products.
【单选题】What is the problem?
A.
The woman forgot an item.
B.
The presentation isn't ready.
C.
The man didn't prepare his notes.
D.
The woman has another meeting.
【单选题】给出下列四个命题,其错误的是( ) ①已知 是等比数列 的公比,则“数列 是递增数列”是“ ”的既不充分也不必要条件; ②若定义在 上的函数 是奇函数,则对定义域内的任意 必有 ; ③若存在正常数 满足 ,则 的一个正周期为 ; ④函数 与 图像关于 对称.
【单选题】《旅行社条例》规定,旅行社自交纳或者补足服务质量保证金之日起()内未因侵害旅游者合法权益受到行政机关罚款以上处罚的,旅游行政管理部门应当将旅游服务质量保证金的交存款额降低50%,并向社会公告。
【简答题】____ is the way to work out the problem. 这就是解决这个难题的方法。 2、I have never seen ____ a clever child before. 我以前从未见过这么聪明的孩子。 3、Those two dresses are the ____. 那两条裙子是一样的。 4、The weather of China is quite sim...
【多选题】实际工作中,由于地形、地质、经济和社会发展各方面的需要,往往事先规定某些站的位置。剩下的问题就是如何布置其余的压气站。对于这类问题,我们一般事先知道下列条件In practical work, due to the needs of the surface, geological, economic and social development, the position of certain s...
A.
线路的起、终点和全长,某些规定站的站址,各进气点和分气点的位置The location of the line, the finish line and the length of the line, the location of the station, the location of the points and the gas points
B.
各段的任务输气量,各进气点的进气量和分气点的分气量,终点配气站的耗气量The task volume of each section, the air intake volume of each air intake point and the air distribution point, the air consumption of the terminal distribution station
C.
首站的进站压力PZ1,终点配气站进站的最低压力P2minThe initial station is pressure pz1, the minimum pressure p2min for the terminal distribution station
D.
已知或预选各段的管径、壁厚和最高的工作压力Pmax Known or pre-selected section diameter, wall thickness and highest working pressure Pmax
E.
可能选用的压缩机类型和技术参数。Known or pre-selected section diameter, wall thickness and highest working pressure Pmax
【单选题】在对数函数 中,下列描述正确的是( ) ①定义域是 、值域是R ②图像必过点(1,0). ③当 时,在 上是减函数;当 时,在 上是增函数. ④对数函数既不是奇函数,也不是偶函数.
【单选题】______, he always tries his best to solve it.
A.
Though difficult the problem is
B.
However difficult the problem is
C.
Though difficult is the problem
D.
However the problem is difficult
【单选题】旅行社条例》规定,旅行社自交纳或者补足服务质量保证金之日起( )内未因侵害旅游者合法权益受到行政机关罚款以上处罚的,旅游行政管理部门应当将旅游服务质量保证金的缴存款额降低50%,并向社会公告。