下列说法正确的有
①元谋人是我国最早的人类 ②北京人还保留有猿类特征
③北京人已懂得人工取火 ④北京人能吃到烧烤的食物 [ ]
A.①②③④
B.①②④
C.①②③
D.①③
答案:B
Mary,Laura, Jim, Jack和Jenny各自丢失了一样东西,请你仔细阅读第6-10题中的他们对各自失物的描述,然后从A到F六个选项中选择相对应的图片(有一项多余)。
6.Mary: Hi, my name is Mary. My ID card is lost. My card number is zero three eight five six. Thank you
7.Laura: Hi, I’m Laura. I lost my notebook. Its color is yellow. It’s not a very big one. Thanks
8.Jim: Help, help! I can’t find my favorite football. It is white and black. It’s a new ball. Please help me.
9.Jack: I’m Jack Brown. I lost a photo of my family. My father, mother, sister and I are in the photo.
10.Jenny: My name is Jenny. I am new here. I am not happy because my black watch is lost. My telephone number is 5649-0983. Please call me.
读“北半球某气压场受力平衡时的风向图”(图中气压单位为百帕)。回答题。
小题1:图中箭头分别代表水平气压梯度力、地转偏向
力、摩擦力和风向的字母依次是
A.abcd
B.abdc
C.badc
D.cbad小题2:关于风向、风力的叙述,正确的是
A.水平气压梯度力只影响风力,不影响风向
B.摩擦力只影响风力,不影响风向
C.地转偏向力只影响风向,不影响风力
D.在地转偏向力的持续作用下,最终风向与等压线平行