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【判断题】
边材是靠近树皮的部分，其材色较深，水分较少，材质较硬。心材是靠近髓心的部分，其材色较浅，材质较松软，水分较多。
A.
正确
B.
错误
举报
参考答案：
参考解析：
刷刷题刷刷变学霸
举一反三
【单选题】The Antarctica is actually a desert. It is the only continent on the earth without a river or a lake. The Antarctica is all ice all year round. The warmest temperature ever recorded there is zero, at ...
A.
it gets wet
B.
the next snowfall comes
C.
the temperature gets colder
D.
the snow above it is heavy enough