激素的传递方式有()。
A.远距离分泌
B.神经分泌
C.旁分泌
D.腔内分泌
E.经有导管的腺体分泌
参考答案:A, B, C, D
人类为了珍爱自己的生命,使自己生活的更美好,必须保护生命的家园-- 地球。[ ]
After the snowstorm, mailboxes in the community were covered by snow, or _______, or lying on the ground.
A.breaking
B.being broken
C.having broken
D.broken