仲裁机构管辖权的行使是强制性的。
参考答案：错
根据图片选出正确单词填空，把序号写在横线上。
1. Look! I have a ______________ (A. doll B. candle).
2. How many ______________ (A. balls B. balloons) ?
3. Let's fly the ______________ (A. kite B. boat).
4. This ______________ (A. gift B. plane) is for you.
培养真菌的最适合pH是（）.
A.2.0～4.0
B.3.0～5.0
C.4.0～6.0
D.5.0～7.0
E.6.0～8.0
______________ (A. doll B. candle).
______________ (A. balls B. balloons) ?
______________ (A. kite B. boat).
______________ (A. gift B. plane) is for you.