It is generally believed that the appropriate daily seepage amount for high-yield rice fields is
A: A. 35mm or more;
B: B. 30~35mm;
C: C. 10~15mm;
D: D. 5mm or more.
A: A. 35mm or more;
B: B. 30~35mm;
C: C. 10~15mm;
D: D. 5mm or more.
举一反三
- A1图纸装订边的宽度尺寸为 A: 35mm B: 25 mm C: 15 mm D: 5mm
- 内径百分表的测量范围有()等。 A: (10~18)mm B: (18~35)mm C: (35~50)mm D: (50~100)mm E: (100~160)mm
- 当抹灰层厚度大于或等于( )时,应采取加强措施。 A: 25 mm B: 30 mm C: 35 mm D: 40 mm
- 正常成人右下肺动脉主干直径一般为:() A: ≤ 5 mm B: ≤ 8 mm C: ≤ 10 mm D: ≤ 15 mm E: ≤ 20 mm
- 油润滑轴承内侧到箱体内壁之间的距离( ) A: 3~5 mm B: 10~15 mm C: 3~15 mm D: 15~20 mm