English is very important and it is ________ used all over the world. A. badly B. especially C. widely D. exactly
—Our holiday cost a lot of money. — Did it? Well, that doesn’t matterk#s^5*u ________ you enjoyed yourselves. A. even if B. in case C. as far as D. as lon
下列关于基因重组的说法，不正确的是（） A． 生物体进行有性生殖过程中控制不同性状的基因的重新组合属于基因重组 B． 减数分
如图所示，一条形磁铁放在水平桌面上，在其左上方固定一根与磁铁垂直的长直导线，当导线中通以图示方向的电流时 （
Once educated to speak properly, the girl could ____________ (冒充成女公爵) at an ambassador”s garden party.
已知函数f(x)=x-,且此函数图象过点(5,4),则实数m的值为 .
下列反应对应的离子方程式正确的是 A．澄清的石灰水与稀盐酸反应：Ca（OH）2+2H+====Ca2++2H2O B．钠与水的反应：Na+2H2O====Na++2OH一+H2↑ C．氧化铜与稀硫酸
，则
的夹角为 。
