Bungee jumping is an adventurous sport, popular with young adults, _____ courage matters more than strength.
A：whose
B：which
C：of which
D：where
塑料矿泉水瓶遇热水会变____，又变凉后，矿泉水瓶会变____。
用科学记算器计算：2×sin15°×cos15°=____
9÷3＝____
