当改原料中N含量增多,R2101反应温度应()。
A、提高
B、降低
C、不变
D、以上都不是
参考答案:A
半衰期的表示方法是().
A.t1/2
B.Cmax
C.tmax
D.AUC0→∞
E.Cl
Since 1994, the glacier in Antarctica has lowered by as much as 90cm, ______________sea level to rise.
A.having caused
B.causing
C.caused
D.being caused