16．在下面一段文字横线处补写恰当的语句，使整段文字语意完整连贯，内容贴切，逻辑严密，每处不超过15个字。（6分） 牛奶，最古老的天然饮料之
下列关于机体水和无机盐调节的叙述中正确的是 A．血浆渗透压降低时，引起口渴 B．机体失水时，抗利尿激素分泌减少 C．血浆渗透压
完形填空He lost his arms in an accident. Since then，he has had to depend on his 1 brother. In order to 2 him，his younger brother became his shadow (影子)，never leaving him 3 fo
在正三棱锥S-ABC中，M、N分别是棱SC、BC的中点，且MN⊥AM，若侧棱SA=，则此正三棱锥S-ABC外接球的表面积是（ ） A. 12π B. 32π C. 36
已知函数f(x)＝2cos (ω＞0)的最小正周期为2π. (1) 求函数f(x)的表达式； (2) 设θ∈，且f(θ)＝＋，求cosθ的值．
下列有关尿素[CO(NH2) 2]的说法，错误的是 A、它可以作氮肥 B、尿素分子中碳、氢原子个数比为1：4 C、尿素由碳、氧、氮
Below is a passage adapted from the network edition of China Daily. Event Li Yang, one of China’s most famous English teachers, apologized for beating his American wife more than a week after she p
They printed Legacy on their own and worked tirelessly toit online and in schools, libraries and bookstores. A. prove B. promote C. permit D. achieve
