【单选题】Before the mid-nineteenth century, people in the United State eat most foods only in season. Drying, smoking, and salting could preserve meat for a short time, but the availability of fresh meat, like...
A.
shipped in refrigerator cars
B.
a staple part of the American diet
C.
available in limited quantities
D.
unavailable in rural areas
【单选题】Why does rain produce a lot of mosquitoes?
A.
Mosquitoes can find enough food in rainy season.
B.
Rain makes grass grow fast.
C.
Rain provides a good living condition for mosquitoes.
D.
Rain provides an abundant supply of water.
【多选题】如图所示,a为带正电的小物块,b是一不带电的绝缘物块,a、b叠放于粗糙的水平地面上,地面上方有垂直纸面向里的匀强磁场,现用水平恒力F拉b物块,使a、b一起无相对滑动地向左加速运动,在加速运动阶段()
【单选题】阿里巴巴的马云 20 世纪 90 年代中后期在美国时发现美国“ ebay ”网的网络销售情况很好,于是其在中国搞了“淘宝”,请问马云选择创业项目的方法是( )。
【简答题】The cost of the new equipment
【单选题】From the conversation, we learn that the cost of the new wing
A.
is more than 90 million.
B.
is less than 90 million.
D.
is 90 million in total.
【单选题】如图所示,物块A和B叠放在一起,水平拉力F作用在A上使A、B一起在水平地面上向右做匀速运动.已知A的质量为 ,A与B之间的滑动摩擦系数为 ,则 :
【判断题】When land with an old building is purchased as a future building site, the cost of removing the old building is part of the cost of the new building