5. What does Mark Westhusithink of humacloning? ·It's worthwhile though stupid ·It's worthless and stupid. ·It should be attempted only after animal cloning is perfect. ·It is efficientbut dangerous.
答案是:单选题 ·. cloning ·It'sstill uncertain when Missy can be successfully cloned. · · ·It's worthless and stupid.