Which of the following options is not greenhouse gas?
A: CO2;
B: N2;
C: CH4;
D: N2
A: CO2;
B: N2;
C: CH4;
D: N2
举一反三
- Which of the following is not a greenhouse gas ( ). A: H2O B: CO2 C: NO2 D: N2
- Which of the followings is not greenhouse gas?(()). A: CO2 B: CH4 C: N2 D: CFC<br/>[单选题][2分][难度3]
- The main greenhouse gas is _______. A: CO2 B: NOx C: SO2 D: N2
- 下列气体不属于温室气体的是（ ） 。 A 、 N 2 O B 、 CO 2 C 、 CH 4 D 、 SO 2 下列气体不属于温室气体的是（ ）。 A: N2O B: CO2 C: CH4 D: SO2
- 下面N×N的笛卡尔积的子集中，哪些可以构成函数？ A: {(n1,n2) | n1,n2∈N and n1+n2 <10} B: {(n1,n2) | n1,n2∈N and n2 = n1^2} C: {(n1,n2) | n1,n2∈N and n1 = n2^2} D: {(n1,n2) | n1,n2∈N and n2为小于n1的素数个数}