影响性成熟的因素。
参考答案：
影响性成熟时间因素：种类、品种、性别、营养、气候和管理情况（最大的营养），小型牛比大型牛早。
看图短文填空，每空词数不限。
Dear Mum,
I (1)_______ some things. Can you (2)_______ them to school for me? They are my note book, my ID
card, my hat, my pencils and a clock. They are all in my room. My notebook is (3)_______. My ID car
(4)_______. The hat is (5)_______ and the pencils are in the pencil case (6)_______.You call find my alarm
clock (7)_______. Thanks,
Ann
关于"肾盂积水"的影像，下列说法错误的是（）
A.肾影增大
B.均可找到梗阻原因
C.IVP示肾盂显影延迟
D.IVP示肾盂显影浅淡
E.CT示肾实质变薄
