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共找到 1357699 与boat/乘公共汽车 相关的结果,耗时227 ms
已知向量a,b是两个非零向量,当a+b(t∈R)的模取最小值时,(1)求t的值(2)已知a,b共线同向时,求证b与a+tb垂直
数学
线圈在匀强磁场中转动产生电动势e=10sin20πt(V),则下列说法正确的是()A.t=0时,线圈平面位于中性面B.t=0时,导线切割磁感线的有效速率最大C.t=0时,穿过线圈的磁通量最大D.t=0.4s
物理
画出下面句子中划线字的正确读音。一天,雷锋出差(A、chāB、chāi),踏(A、táB、tà)上了从抚(A、fǔB、hǔ)顺开往沈阳的列车。他看到旅客很多,就把自己的座位
语文
他帮助列车员 扫 (A、sǎ
行星计算a^3/T^2=k这个公式中a,T的单位是什么?
物理
若对于任意的实数a>1且b>1,不等式a^2+b^2>t(a+b-2)恒成立,则实数t的最小值
数学
i"m sure you"d rather she went to schoolI"m sure you"d rather she went to school by bus,______?A.hadn"t you B.wouldn"t you C.aren"t I
英语
.didn't she不应该
Excuse me,______where is the Great wan Hotel?A.and B.or C.but D.soHe goes to his school________.A.by his bike B.by the bike C.on a bik
英语
D.on his bike
If I hadn"t stood under the ladder to catch you when you fell,you____now.A wouldn"t be smiling B couldn"t have smiled C won"t smile D
英语
idn't smile
If I hadn"t stood under the ladder to catch you when you fell,you___now.为何不用C?A.wouldn"t be smiling B.won"t smileC.couldn"t be smiling
英语
D.didn't smile
If i hadn"t stood under the ladder to catch you when you fell ,you ___ now.A wouln"t be smiling B couldn"t have smiled C won"t smile D
英语
didn't smile
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