忽必烈时期重要的水利人才是()
A、赵守敬
B、王守敬
C、郭守敬
D、陆守敬
参考答案:C
电梯轿厢安全触板的开关正常,电梯不关门的可能原因是随行电缆中开关指令的电缆线因反复运行而导致疲劳折断.()
What is the pig doing? The pig is ___________. [ ]
A. hugging
B. eating
C. sleeping