红嘴鸥是我市的一种美丽的动物,她能在陆上、水上、空中进行运动,那么她在空中的主要运动器官是( ) A、翼 B、蹼 C
It remains whether Jim’ll be fit enough to play in the finals. A.seen B.to be seen C.seeing D.to see
王刚在使用显微镜观察细胞分裂切片时,发现分生区细胞偏左上方,要把它移到视野中央,装片应向哪里移到( ) A.左上方B.左下方C.右上方D.右
注意: 1.短文必须包括所有内容要点,可适当发挥; 2.词数:100左右。 3.参考词汇: appearance 外貌 state of mind 心态 Dear Xiao Wang, I have received an
9、在约束条件下,当35时,目标函数z=3x+2y的最大值的变化范围是 A、[6,15] B、[7,15]C、[6,8] D、[7,8]
若为奇数,被除所得的余数是( ) A.0 B.2 C.7 D.8
A couple of years ago, I came to a lady’s house to buy some vitamins. Upon entering the house, I 21 that there was an electronic keyboard on a stand, leaning 22 the wall. Be