题目

写作 下周六将是你15岁生日，你准备晚上在家举办一场生日晚会，你想邀请你的朋友Tom 参加。请根据内容提示，完成下面的邀请函，每空一词。Dear Tom,    I’m going to have my____1____birthday party at home next Saturday. Would you like to come? I’msure you’ll enjoy ____2___ at the party. By the way, I hope you can bringyour friends to the party. A party is more __3____with more people. I’mreally looking ____4______ to it. You can ____5____ me an e-mail to let meknow if you can come.                           �如图所示，某人用托里拆利管做测定大气压强的实验时，由于管内漏进了空气，测得管内汞柱的高度仅为70cm，但当时的实际大气压强为一个标准大气压(相当于76厘米高的汞柱产生的压强)。今采用下述哪种方法，可使管内、外汞面的高度差大于70cm A.把托里拆利管逐渐倾斜(管子露出部分长度不变)B.把托里拆利管慢慢向上提,但下端不离开汞槽C.保持装置不动,往汞槽内加汞,以增大压强D.整个装置竖直向上做加速运动