皮皮学，免费搜题
登录
搜题
【简答题】
下列程序运行结果是: import numpy as np a = np.array([1,4,8,6]) b = np.mean(a) print(b)
拍照语音搜题，微信中搜索"皮皮学"使用
参考答案：
参考解析：
知识点：
皮皮学刷刷变学霸
举一反三
【简答题】低温热水采暖系统的供水温度一般为_______(数字)摄氏度,回水温度一般为_______(数字)摄氏度。
【单选题】The teacher is writing ____ a piece of chalk on the blackboard while the students are writing ____ink in exercise books.
A.
with, in
B.
in, with
C.
in, in
D.
with, with
【简答题】While writing exams for courses other than English, you may tend to ______.
【简答题】热水采暖系统按热水参数的不同分为低温热水采暖系统，供水温度低于100℃，供水一般为95℃，回水一般为（ ）℃。 [填空(1)]A.
【单选题】While Mary ___ a letter, the children were playing outside.
A.
wrote
B.
writes
C.
is writing
D.
was writing